hey guys and gals, has anyone used or demo their commercial ztrs? i saw on their website their models zt29 and zt33. they are both diesel engines and they have shaft drive and hydrauic lift. from the picture they look like they are really well made. they even have a high volume 72 inch deck for heavy applications. the only problem it doesn,t say who makes the diesel engines. and i wonder who makes their machines. any info would be appreciated since i will be buying in the spring.